Nanotechnology Spotlight – Latest Articles

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Showing Spotlights 9 - 16 of 2416 in category All (newest first):


New theory unveils obscure nonvolatile resistive switching in 2D materials

nanomaterialNonvolatile resistive memory (NVRM), also called a 'memristor', is an emerging technology that offers the possibility of in-memory computation and thus holds promise to overcome the von Neumann bottleneck. NVRM is a two-terminal device but, unlike an ordinary resistor, it exhibits hysteresis in input-output characteristics and thus can be also be used as memory. A new theory suggests that such resistive switching is an intrinsic property of a vacancy-inhabited two-dimensional materials and may not depend on the physio-chemical interactions with the electrodes.

Mar 24th, 2021

Toward perdurable flexible electronics

flexible-electronicsIn order to realize practical device applications of stretchable strain sensors, stability without sacrificing sensitivity, stretchability, and scalability is crucial. To that end, researchers report a kirigami-structured graphene-polymer hybrid nanocomposite for strain sensors by a laser direct writing technique on a polyimide sheet. The approach of laser direct writing not only contributes to the conversion of polyimide material into conductively porous carbonized film, but also gives rise to the formation of kirigami-shaped structures with highly stretchable capability in a fast and efficient manner.

Mar 23rd, 2021

Understanding ionic phenomena in liquid crystals doped with nanoparticles

liquid-crystalsLiquid crystal materials are ubiquitous in everyday life. Recently, a new way to create advanced liquid crystal materials by merging nanotechnology and liquid crystals was discovered: by adding nanoscale objects to liquid crystals, new materials with superior physical properties can be created. However, this raises an important question: How do nanoparticles affect ionic processes in liquid crystals? Here is an overview of recent advances in the understanding of ionic phenomena in liquid crystals doped with nanomaterials.

Mar 18th, 2021

Delivering semiconductor quantum dots into live cells

quantum-dotsResearchers achieved a milestone in exploring biology using nanotechnology utilizing single-particle tracking to investigate the interaction between human T cells and individual fluorescent nanoparticles of semiconductor quantum dots (QDs). The researchers were able to deliver QDs into the cytosol of live T cells by decorating the nanoparticles with a unique cell-penetrating peptide. The study paves the way for improving drug delivery and immunotherapy using novel nanocarriers.

Mar 12th, 2021

Polymer nanocomposites - additives, properties, applications, environmental aspects

polymer-nanocompositeVarious additives are added to plastics to either improve processability, change product properties or protect them against thermal, UV or light influences. In the case of a polymer nanocomposite, the additives have at least one dimension of less than 100 nm and can be found in the form of platelets, fibres or particles. They primarily serve to improve tensile strength, thermoformability, flame retardancy, optical and electrical properties, and the barrier properties of the plastic into which they are incorporated.

Mar 10th, 2021

van der Waals heterostructures harness ionic power from photo-induced ion transport

heterostructuresIn general, there are three types of driving force for ion transport: electric field; mechanical pressure; and concentration gradient. Recently, light has been propsoed as a fourth. Now, researchers report the incorporation of a transition metal dichalcogenides based van der Waals multilayer heterostructure into nanofluidic materials, and demonstrate a new photo-induced active ion transport phenomenon. This will inspire a broad range of fundamental research and practical application for light-controlled ionic circuits, artificial photosynthesis, biomimetic energy conversion, and so on.

Mar 4th, 2021

Rolling 2D van der Waals heterostructures into 1D nanotubes

heterotubeThe properties ofvan der Waals heterostructures can be precisely controlled by twisting the stacked atomic layers, opening the way for the use of this unique degree of freedom for the nanoscale control of composite materials and nano-devices in future technologies. New work suggests that all 2D materials could also be rolled into their 1D counterparts and a plethora of function-designable 1D heterostructures could be realized. Unlike semiconductor nanowires or mono-elemental nanotubes, which are rolls of one type of material, these novel nanostructures would have very different, and customizable, properties.

Mar 2nd, 2021

Using living bacteria to design self-growing engineering materials

cubeIn another step towards engineered living materials, researchers combined living bacteria and 3D-printed materials to grow bionic mineralized composites with ordered microstructures. It provides an example of harnessing living bacteria to design self-growing materials and opens the door for a new class of engineering materials that can self-grow like living creatures. This manufacturing strategy can be easily extended by selectively controlling the activity of living organisms to synthesize unprecedented structural composites with ordered, hierarchical, and gradient microstructures.

Feb 23rd, 2021